Aside from the improvements to the decompilaton engine, you will also find the MEF-based extensibility in this milestone. For documentation and samples please see the source download (or glance over the readme). We are keen on getting feedback before entering the Beta phase for ILSpy. (ILSpy Forum)

You want to remote-control ILSpy? This feature has landed too in M2 – to get a highly technical overview, visit our command line readme.